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[FEAT MERGE] Lob SQL refactoring (Mem-LobLocator, expressions and dbms_lob adaptions)

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Co-authored-by: chaser-ch <chaser.ch@antgroup.com>
This commit is contained in:
obdev
2023-01-28 20:40:15 +08:00
committed by ob-robot
parent 4bb1033505
commit 3d4f554258
350 changed files with 19091 additions and 3918 deletions
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27
src/sql/engine/expr/ob_expr_crc32.cpp
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@ -19,6 +19,7 @@
#include "sql/engine/expr/ob_expr_crc32.h"
#include "sql/engine/expr/ob_expr_util.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/engine/expr/ob_expr_lob_utils.h"
namespace oceanbase {
using namespace common;
@ -48,22 +49,38 @@ int ObExprCrc32::calc_result_type1(ObExprResType& type, ObExprResType& type1, Ob
return ret;
}
inline void calc_crc32_inner(const ObString &str_val, ObDatum &res_datum)
{
if (str_val.empty()) {
res_datum.set_uint(0ULL);
} else {
unsigned char* buf = reinterpret_cast<unsigned char*>(const_cast<char*>(str_val.ptr()));
res_datum.set_uint(crc32(0, buf, str_val.length()));
}
}
int ObExprCrc32::calc_crc32_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
{
int ret = OB_SUCCESS;
unsigned char* buf = NULL;
ObDatum* s_datum = NULL;
const ObDatumMeta &datum_meta = expr.args_[0]->datum_meta_;
if (OB_FAIL(expr.args_[0]->eval(ctx, s_datum))) {
LOG_WARN("eval arg failed", K(ret));
} else if (s_datum->is_null()) {
res_datum.set_null();
} else {
} else if (!ob_is_text_tc(datum_meta.type_)) {
const ObString& str_val = s_datum->get_string();
if (str_val.empty()) {
res_datum.set_uint(0ULL);
calc_crc32_inner(str_val, res_datum);
} else { // text tc
ObString str_val;
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *s_datum,
datum_meta, expr.args_[0]->obj_meta_.has_lob_header(), str_val))) {
LOG_WARN("get string data failed", K(ret));
} else {
buf = reinterpret_cast<unsigned char*>(const_cast<char*>(str_val.ptr()));
res_datum.set_uint(crc32(0, buf, str_val.length()));
calc_crc32_inner(str_val, res_datum);
}
}
return ret;